Neural Mechanisms Underlying Astigmatism

Status Recruiting

Clinical Trial Summary

This study is to compare the contrast sensitivity function and neural response to gratings before and after the orientation discrimination task in the astigmatism or amblyopia patients.

Clinical Trial Description

The presence of astigmatism can lead to substantial reductions in visual performance in a variety of clinical vision measures and functional visual tasks. However, the neural mechanisms underlying the astigmatism remains unknown. The current study recruited three groups (patients with with-the-rule astigmatism and amblyopia, patients with with-the-rule astigmatism but without amblyopia, normal controls) of subjects and patients receive perceptual learning training (orientation discrimination task) which lasts for around 15 days. This main aim is to compare the contrast sensitivity function and neural response to gratings before and after the orientation discrimination task in the astigmatism or amblyopia patients.

Patients with astigmatism or amblyopia were included in this study. All participants underwent an ophthalmic examination that included slit-lamp biomicroscopy, visual acuity, quick CSF under full optical correction, 9-SF life quality questionnaire and fundus examination. ;

Study Design

Related Conditions & MeSH terms

Astigmatism

Clinical Trial Details

NCT number	NCT03735602
Study type	Interventional
Source	Zhongshan Ophthalmic Center, Sun Yat-sen University
Contact	Li Gu, Phd
Phone	15889937313
Email	guli7@mail2.sysu.edu.cn
Status	Recruiting
Phase	N/A
Start date	July 1, 2019
Completion date	December 2021

View Details

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